Lehmann Audio Black Cube Linear
A necessity for driving high-end headphones
- Perfect build quality, no background noise, powerful
- Heavy (not that it matters!)
The Black Cube Linear is a great product. It's a great addition to your home audio setup if you have expensive headphones that require amplification. Even if you don't, the Black Cube Linear will provide a noticeable boost in sound quality for cheaper headphones.
Price$ 1,449.00 (AUD)
A headphone amplifier like Lehmann Audio's Black Cube Linear amplifier is a necessity if you're using high-end, demanding headphones like AKG's K701. However, this amplifier will still offer greatly improved sound quality with mid-range headphones.
We've only ever looked at one headphone amplifier before — the exemplary SXH2 from Perreaux. We applauded its low noise floor and metered treble — so how did the Black Cube Linear from Lehmann Audio fare? Both amplifiers have their own quirks and advantages that set them apart.
The Black Cube Linear is an imposing beast for a headphone amplifier. All the necessary power circuitry is built into its long, low body rather than being stored in an external power brick. This is great news for those who like to keep their entertainment setups tidy, but it also speaks volumes about the quality of internal wiring. If the power supply is electronically 'quiet' enough to be stored inside the body of the device, you can rest assured it won't introduce any noise into your audio.
The Black Cube Linear we tested had a set of unbalanced stereo RCA sockets as its primary input, though different versions also have USB and 3.5mm connectivity. In addition, the device has a second pair of RCA connectors, which are used as outputs. This means you can use the amplifier in-line between a source and an amplifier for a set of speakers — so you don't need to mess around with cable splitters or switches. Power is delivered through a standard IEC connector, so if you're dedicated (or foolhardy) enough to own an expensive power cable you can use that. The unit's power switch is also on the rear of the unit — instead of integrated into the volume control as is common, because that would degrade sound quality — as is as a removable fuse.
Moving to the front of the unit, the sense of exacting engineering is continued. The four millimetre thick aluminium faceplate is held on with hex screw, with the only components a volume control, two quarter-inch headphone jacks and a single blue power LED.
The volume control is of paramount quality. It's well weighted, requiring only a little force to start its movement. Moreover, the increase in volume is perfectly linear even at lower wattages. Whereas cheaper amplifiers bias to one channel of headphones at lower volumes, the Black Cube Linear is consistently even and balanced.
Obviously the amplifier is designed to drive headphones of premium quality and as such it doesn't bother with consumer-level 3.5mm headphone jacks. While the headphones that require or will benefit most from amplification usually have larger connectors, you will need the appropriate adapter if you're planning on using slightly cheaper headphones.
We tested the amplifier with two vastly different models of headphones from AKG. AKG's K701 are headphones that require an external amplifier to power them, which makes it hard to assess the amplifier's impact. We did find, however, that even with the amplifier's gain set to the lowest value (adjustable with two switches on the base of the unit), the Black Cube Linear was able to drive the headphones to painfully loud volumes. Another good test of the amplifier's capability was to hit maximum volume with no audio playing. There was no noticeable electronic noise or high-frequency hissing audible, which is testament to the fantastic internal components used. The amplifier didn't detract from the neutral, analytical nature of the headphones either — all frequencies were equally weighted, while immense detail was noticeable in complex orchestral music.
We also tested another facet of the Black Cube Linear's performance by connecting a cheaper pair of headphones, the K 272 HD — again from AKG. These headphones don't need an amplifier, being happy to run directly off a computer or MP3 player's 3.5mm headphone output. Connecting them to the Black Cube Linear with a 3.5mm to quarter inch adapter, however, exposed a difference as large as night and day.
Don't get us wrong — running straight from an MP3 player, the K272HD headphones still sounded great. When the amplifier was introduced into the mix, however, bass was punchier, tighter and more accurate, while treble became more pronounced and sweeter. The Black Cube Linear lent a slightly livelier tone to music, making it more involving. Music had a missing element added: that now-noticeable enhancement to bass and treble.
The Black Cube Linear headphone amplifier is a niche product. You probably won't consider it unless you have some equally expensive headphones to drive with it — in which case it will power them faithfully without altering sound quality. If you use it to drive more moderately priced headphones, though, you'll appreciate the extra boost it provides.
Join the newsletter!
Most Popular Reviews
- 1 Samsung Galaxy S9+ review: A predictably-exellent flagship uplifted by a standout camera
- 2 Panasonic Lumix G9 review: A mirrorless moulded to the needs of still-shooters
- 3 LG 65E7T Ultra HD OLED TV review: The South Korean thoroughbred is still first past the post
- 4 Hisense takes the fight to home entertainment heavyweights with flagship Series 8 and 9 ULED TVs
- 5 D-Link Omna 180 Cam HD DSH-C310 review
Latest News Articles
- Samsung Announces New 2018 Television Lineup
- Samsung’s Next TV is a Real Frame-Changer
- Express Your Style With Ultimate Ears WONDERBOOM Freestyle Collection
- HomePod review roundup: 'Room filling,' 'best-in-class' sound, but Siri is 'embarrassingly inadequate'
- Sonos say Aussie Alexa support for One smart speaker won't arrive until Autumn 2018
PCW Evaluation Team
The printer was convenient, produced clear and vibrant images and was very easy to use
I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.
It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.
Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.
The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.
The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.
- Everything You Can Do, I Can Do Better: Comparing The Google Home’s Assistant To Amazon Echo’s Alexa
- Hands On: Pitting the Apple HomePod against the Sonos One
- MWC 2018: Everything You Need To Know
- Which flagship TV is best? Sony 4K HDR Bravia 2016 versus LG 4K HDR OLED 2016
- 10 Blu-ray movies / Best looking Blu-ray movies
- FTIT Program ManagerOther
- TPPMO AnalystNSW
- TPSQL DeveloperQLD
- CCJunior Project AnalystVIC
- FTOBIEE DeveloperACT
- TPProject Manager. Business Process TransformationNSW
- TPBusiness AnalystNSW
- CCProject CoordinatorNSW
- CCProject Manager-SCADAQLD
- FTSenior Project CoordinatorOther
- TPChange ManagerNSW
- CCProject Manager - CRMQLD
- FTSenior Full Stack Developer - Blue Chip CompanyOther
- FTSignalling Project ManagerWA
- FTBusiness AnalystSA
- FTData ScientistOther
- FTBusiness Connection Manager (Telco/Operations)Other
- CCInfrastructure ArchitectWA
- FTPeoplesoft HCM Application DeveloperACT
- FTSenior Business Analyst - PERMANENT -Other
- CCProject Manager - Service ManagementWA
- FTCyber Security Solution ArchitectOther
- CCUI iOS & Android DeveloperVIC
- CCPEGA SSA DevVIC
- FTDatabase AdministratorOther